# In Example 13.6 (Vinnicombe metric), the formula for conjugate point is missing a minus sign

From FBSwiki

Edition | Second |
---|---|

Version number | 3.0j |

Submission date | 19 Aug 2019 |

Your name | Richard Murray |

E-mail address | murray@cds.caltech.edu |

Chapter | 13 |

Page number | 13-8 |

Line number | -9 |

Current status | Closed |

The formula for the conjugate points should be $1 + P_1(i\omega) P_2(-i\omega)$ = 0 (the argument to $P_2$ is missing a minus sign). .